Elevating-truck.



' J. fr. AIHERTONQ ELEVATIN'G TRUCK. APPL-IIQATION FILED MAR; '6. 19H

l,19.,'o PatentedAu'g. 29,1916.

2 SHEETS-SHEET I.

J. T. ATHERTON.

ELEVATING TRUCK.

APPLICATION FILED MAR-(119N- ll 96,& Patented Aug. 29, 1916.

2 SHEETS-SHEET 2'.

JOHN T. A'IHERTON, OF NEW YORK, N. Y., ASSIGNOR, BY MESN'E ASSIGNMENTS, T0 GEORGE P. CLARK COMPANY, OF WINDSOR LOCKS; CONNECTICUT, A GQBPQ1EtA'Il.IOIl\l' or oonivnc'rrciir.

ELEVATIN'G-TRUCK.

Patented ne as, rare.

Application filed March 6, 1911. Serial No. 612,454.

To all whom it may concern:

1 Be it known that 1, JOHN T. .ATI-IERTON, a citizen of the United States, and resident of the borough of Manhattan, in the city and State of New York, have invented a new and useful Improvement in Elevating- Trucks, of which the following is a specification.

This invention relates to improvements in elevating trucks and has for its object to provide a novel mechanism for raising and lowering the upper member of the truck, said mechanism being powerful enough to raise, sustain and permit the transportation of very heavy loads, the parts of the mechanism being so arranged that the raising of the heavy loads may be accomplished easily and rapidly.

A practical embodiment of the lnvention is represented in the accompanying draw- .ings, in WlllCll,

Figure 1 represents the truck in front elevation with its upper member in its lowered position. Fig. 2 is a view ofthe truck in side elevation. Fig. 3 is a longitudinal vertical section taken in the plane, of the line A-A of Fig. 1 Fig. 4 is a similar section with parts broken away and the upper member raised to the limit of its movement 7 away from the lower member, and Fig. 5 1s a transverse vertical section taken in the plane of the line B -B of Fig. 4:.

The lower member of the truck is composed of a platform 1 and uprising sides 2, 3. This platform 1 is supported by wheels 1. In the present instance four of these wheels are shown, the rear wheels being mounted in bearings fixedly secured to the platform 1 and the forward wheels being mounted in bearings swiveled' to the said platform 1. A handle 5 is shown as hinged ,at 6 to the platform 1, for purposes of moving the truck from place to place.

The upper member of the truck comprises 7 a platform 7 and depending sides 8, 9, which depending sides are arranged to rest upon the uprising sides-2, 3, of the lower member when the upper member is at the limit of its movement toward the lower member.

The upper member is guided in its movement toward and away from the lower member and is held against longitudinal movement with respect to the lower member, in the present instance by providing the uprising sides 2, 3, of the lower member with verwhich cam mechanism is constructed, ar-

ranged and operated as follows: Front and rear rock shafts 12, 13, are mounted in suitable bearings 14, 15, on the platform 1 of the lower member of the truck, A plurality of cams, in the present instance two cams, 16, 17, are fixed to the front rock shaft 12 and bear against rollers 18, 19, mounted in suitable bearings 20, 21, fixed to the under side of the platform 7 of the upper member. Similarly a plurality of cams, in the present instance two cams, 22, 23, are fixed to the rock shaft 13 and bear against rollers 2-1, 25, mounted in suitable bearings 26, 27, hired to the under side of the platform 7 of the upper member of the truck. The front and rear cams 16, 22, are connected to move togethe'r by a longitudinally arranged bar 28 and the front and rear cams 17, 23 are connected to move together by a longitudinally arranged bar 29. It will thus be seen that all of the cams are interconnected to move together.

The cam face of each cam which bears against the roller on the upper member of the truck, is curved, preferably with ac'on stantly increasing distance from the axis of the cam, so that as the cams are swung from one position to another, the upper member will be gradually moved toward and away from the lower member. The roller for each cam is located at a point directly over the axis of the said cam, so'that the downward thrust of the load will be directed on to the axis of each cam, thus permitting the cams to be readily and quickly moved from one position to another.

The means which I employ for manually swinging the cams comprises a hand lever 30 which is removably seated in a bracket 31. I This bracket is fixed to move with the cams, in the present instance, by passing two cross tie rods 32, 33, through the two front cams 16, 17, and through the bracket 31, the front rock shaft 12 also passing through the said bracket. The angular relationship and the connection between the lever and its bracket is such that when the lever is in a vertical position, the cams will be in their lowered p member being constructed and-arranged to position, and when the lever is in its horizontal position, the cams will be in their raised position. q

Where is it desired to secure anadditional leverage for raising a very heavy load, the

hand lever 30 may be connected to the handle lowered, and means arranged to ope'ratively downwardly'saidfirst mentioned means will 7 5 by a catch 34. This will give anadditional leverage as the handle 5 is hinged to the lower member of the'truek at a .point below the connection of the hand lever-With its bracket and. the hinged connection of the cams with the lower member. This latch 34:

constructed as to permit the handle-and handlever to move longitudinally one with respect to, the other as .theyare swung from their vertical position \to' their horizontal position. While I have shown four inter connected cams arranged at the four-corners 1 of the truck for-raising the movable member,

1. Atruck comprising the combination of .a base mountedion wheels, a handle pivotedto the truckpa platform movable up and "down, means, to move said platform up and down, a handle operated member constitute ing a part of the aforesaid means pivotally connected to the base at thelforward end 'thereof at a point back of: the. pivotal'connection of the handle,',said handleand said lie adjacent and substantially parallel when the handle is raised and the platform is connect the'handl e operated member and detachable to extend across' and in front of sald handle whereby when the latter 1s swung be moved to elevate the platform.

2. A truck comprisingthe combmation of 1 abase mounted on wheels, a handle pivoted to said truck, a platform movable up and down, elevating devices one arranged at each of the four corners of the truck operable to move the platform up and down and handle. operated means to gperate said devices, comprising a lever-ha mg a pivotal connection with the truck at the forward end thereof,

and at a point back of the connection of the handle therewith constructed and arranged to lie ad acent and parallel to the handle -when thelatter is raisedand the platform lowered together with means connected to "said lever adapted to lie across and in front of said handle whereby When the latter is lowered the platform is raised.

3. A truck comprising the combination of a base-mounted on wheels, a handle pivoted to said truck for a vertical swinging move- :ment, an el'evatable platform on the base,

elevating devices one arranged at each of the four corners of the truck operable to move the platform up and down, and means to opcratesaid devices comprising a lever con nected therewith having a pivoted connection at the forward end of the base ata point back of the pivotal connection of said handle, I

together with means connected to said lever and adapted: to extenckacross and in front of said handle all constructed "and arranged operating said devices by lowering said handle and the handle and lever are 'prevented from binding by a sliding movement betw 11 said handle and the last mentioned ean s.

4. A truck, compri i the comba basemounted on wheels, an elevlf platform, a handle pivoted to 'the forwso thata compound leverage is obtained for end of the truck, elevating devices-betwfiii the base and platform and a handle-operated lever connected to the elevating devices and having a pivotal connection to the forward end of the truck on a different pivot than the ,handle and means connected to said lever adapted to lie across and in front of said handle whereby when the latter is =lowered the platform is raised.

' In testimony, that I claim the foregoing as my' invention, I have signed my name in 'resence of two witnesses, this second day 'of arch, 1911.

JOHN T. ATHERTON.

Witnesses:

F. GEORGE BARRY, HnNRY G. THIEMIE. 

